Finding the Fourth Proportional to 160,042.72, 240,133.20 and 89,816.80

Step by Step Solution

1. Step 1: Write the proportion equation
   160,042.72 : 240,133.20 = 89,816.80 : x
2. Step 2: Convert to fraction form
   160,042.72/240,133.20 = 89,816.80/x
3. Step 3: Cross multiply
   160,042.72x = 240,133.20 × 89,816.80
4. Step 4: Simplify right side
   160,042.72x = 21,567,995,597.76
5. Step 5: Solve for x
   x = 21,567,995,597.76/160,042.72
6. Step 6: Final answer
   x = 134,763.99